Vulnerabilities in Signaling System 7 (SS7) have been spotlighted as early as 2014. This allows criminals to spy on conversations and text messages on mobile phones, but also track location by simply knowing the victims phone number. O2 Telefonica, the German network provider, had a few customers affected. This has been confirmed by O2, which had customers affected by SS7 attacks. If criminals can intercept phone messages with safe codes, millions of internet users will struggle with major privacy risks.”]